EP2485291B1 - Elektrische Speichervorrichtung - Google Patents
Elektrische Speichervorrichtung Download PDFInfo
- Publication number
- EP2485291B1 EP2485291B1 EP12153238.6A EP12153238A EP2485291B1 EP 2485291 B1 EP2485291 B1 EP 2485291B1 EP 12153238 A EP12153238 A EP 12153238A EP 2485291 B1 EP2485291 B1 EP 2485291B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gasket
- current collector
- case
- storage device
- electric storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003860 storage Methods 0.000 title claims description 26
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 18
- 238000003780 insertion Methods 0.000 description 14
- 230000037431 insertion Effects 0.000 description 14
- 238000007789 sealing Methods 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- -1 nickel metal hydride Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/545—Terminals formed by the casing of the cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Definitions
- the present invention relates to an electric storage device including a case electrically connected to a positive electrode or a negative electrode.
- Batteries including a non-aqueous electrolyte secondary battery, a nickel-cadmium battery, and a nickel metal hydride battery are widespread as a power source of mobile electronic equipment such as a mobile phone, a personal computer and a video camera, by taking advantage of the characteristics of being compact and lightweight and having high energy density.
- mobile electronic equipment such as a mobile phone, a personal computer and a video camera
- Such batteries are those where a winding type power generating element that strip electrodes are wound via a separator, or a stack type power generating element that flat-plate electrodes are laminated via a separator is housed in a battery case, the battery case is sealed with a battery lid, and a positive terminal and a negative terminal are attached to the exterior of the battery.
- a battery case serves as one electrode terminal and the other electrode terminal is attached to the exterior of the battery in a state of being insulated from the battery case.
- the present invention has been made considering the above circumstances, and an object thereof is to provide an electric storage device with a simple configuration including a current collector, a case, and a conductive member electrically connected with each other while a gap between the case and the conductive member is limited.
- the present invention is defined by independent claim 1.
- the dependent claims relate to further aspects of the present invention.
- An electric storage device includes a case, a positive electrode, a negative electrode, a current collector, a gasket, and a conductive member.
- the case has a mounting hole.
- the positive electrode and the negative electrode are housed in the case.
- the current collector has a first end and a second end. The first end is connected to any one of the positive electrode and the negative electrode. The second end is in surface contact with an inner surface of the case and electrically connected to the inner surface of the case.
- the gasket includes an inner gasket in contact with an area of the inner surface of the case between the mounting hole and the second end of the current collector.
- the conductive member includes a body and an inside large-diameter portion having a larger diameter than that of the body.
- the body is arranged in the mounting hole of the case.
- the inside large-diameter portion is disposed at one end of the body inside the case, electrically connected to the second end of the current collector, and arranged so as to be in contact with the inner gasket such that the inner gasket and the second end of the current collector are sandwiched between the inside large-diameter portion and the case.
- the case Since the second end of the current collector and the conductive member are electrically connected, a potential at the positive or negative electrode is extracted to the outside via the conductive member. Moreover, since the second end of the current collector and the inner surface of the case are electrically connected, the case is at the same potential as the positive or negative electrode. Additionally, the gasket is sandwiched between the inner surface of the case and the inside large-diameter portion of the conductive member. Accordingly, the case, the current collector and the conductive member are electrically connected while a gap between the case and the conductive member is limited.
- the inner gasket may be sandwiched between the second end of the current collector and the body of the conductive member.
- the gasket is sandwiched between the second end of the current collector and the body of the conductive member, and therefore a gap is less likely to be formed between the current collector and the conductive member.
- the conductive member may include an outside large-diameter portion having a larger diameter than that of the body.
- the outside large-diameter portion is disposed at another end of the body outside the case.
- the gasket may further includes an outer gasket sandwiched between the outside large-diameter portion of the conductive member and the outer surface of the case.
- a gap is further less likely to be formed between the case and the conductive member.
- the electric storage device may include an outer washer having a smaller diameter than that of the outer gasket.
- the outer washer is disposed between the outside large-diameter portion of the conductive member and the outer gasket.
- the case, the gasket and the current collector are more strongly held between the outside large-diameter portion and the inside large-diameter portion.
- the outer gasket may include a projection in contact with an outer peripheral surface of the outer washer. Accordingly, the outer gasket and the outer washer are less likely to be displaced.
- the inner gasket and the outer gasket may be made of different materials.
- the inner gasket may be made of a material having at least one of higher elasticity, airtightness, heat resistance, an insulation property, and corrosion resistance, than the outer gasket. Accordingly, the inner and cuter gaskets can be made of suitable materials, respectively.
- the gasket may include a tubular gaskets having an outer peripheral surface and an inner peripheral surface.
- the outer peripheral surface may be in contact with a wall of the mounting hole.
- the inner peripheral surface may be in contact with the body of the conductive member,
- the tubular gasket may be integrally formed with at least one of the inner gasket and the outer gasket.
- the at least one of the gaskets may have a through hole with an edge the tubular portion for an entire outer circumference.
- the positional relationship between the case and the conductive member can be maintained while a gap between them is limited. Furthermore, the one of the gaskets can be more flexibly deformed in comparison to a gasket that is in direct contact with the conductive member without being through the tubular portion.
- the conductive member may have a sloped surface angled with respect to an axis of the body. Furthermore, the second end of the current collector and the inner gasket may be in contact with the sloped surface.
- a contact area between the second end and the inner gasket is larger in comparison to a contact area between a current collector and a gasket, surfaces of which in contact are parallel to the axis of the body. Accordingly, a gap is further less likely to be formed.
- the electric storage device may further include an inner washer disposed between the second end of the current collector and the inside large-diameter portion of the conductive member.
- the case, the gasket and the current collector are more tightly held between the outside large-diameter portion and the inside large-diameter portion.
- an electric storage device with a simple configuration including the current collector, the case, and the conductive member electrically connected while a gap between the case and the conductive member is limited.
- a battery according to the present embodiment (hereinafter referred to as "the battery") includes a case, a positive electrode, a negative electrode, and positive and negative terminal assemblies.
- the positive electrode and the negative electrode are housed in the case.
- the positive and the negative terminal assemblies are provided for the positive electrode and the negative electrode, respectively, and arranged on the case.
- Each of the terminal assemblies includes a current collector, an outer gaskets, an inner gasket, and a conductive member.
- the current collector is electrically connected to the case and the conductive member.
- the case is electrically connected to the positive electrode or the negative electrode.
- the case maybe electrically connected to the negative electrode, however, the case is electrically connected to the positive electrode in the following example.
- the case includes a container having a predetermined capacity and a lid arranged so as to cover an opening of the container.
- the battery includes a container 1 having a predetermined capacity, a positive electrode 2A and a negative electrode 2B, a lid 3.
- the container 1 has an opening 1A.
- the positive electrode 2A and the negative electrode 2B are housed in the container 1.
- the lid 3 is arranged so as to cover the opening 1A of the container 1.
- the container 1 and the lid 3 are configured as a battery case.
- the lid 3 is a rectangular flat plate having predetermined strength as a housing.
- a positive terminal assembly 10 is arranged in an area of the lid 3 close to one of ends of the lid 3 (on the lett side in FIG. 1 ) and the negative terminal assembly 20 is arranged in an area thereof close to the other end (on the right side in FIG. 1 ).
- the positive terminal assembly 10 is provided with an external terminal 11 and a rivet 12, and the terminal assembly 20 for the negative electrode is provided with an external terminal 21 and a rivet 22.
- the electrodes 2A and 2B are arranged in the container 1 and edges of the lid 3 in the opening 1A are sealed, Namely, the electrodes 2A and 2B are held in closed space inside the container 1.
- the container 1 has a thin box shape with an opening at an upper end.
- the container 1 is made of metal having strength appropriate as a housing (for example, stainless and aluminum). Because the container 1 is made of metal, the case has an electric potential.
- the edges of the lid 3 may be welded to the container 1. However, a method for fixing the lid 3 to the container 1 is not limited to the welding.
- the lid 3 may be fixed to the container 1 with an adhesive, or clamped to the container 1 with projections expending from the edges of the lid 3.
- the positive terminal assembly 10 includes a current collector 13, an inner gasket 14, an outer gasket 15, and the rivet 12.
- a first end of the current collector 13, which is not illustrated, is connected to the positive electrode 2A, and the second end 13A thereof is in surface contact with an internal surface 3A of the lid 3 and electrically connected to the lid 3 and the rivet 12.
- a round mounting hole 3B with a diameter D1 is formed through the one end side of the lid 3 .
- An insertion hole 13B with a diameter D2 that is larger than the diameter D1 is formed on the same axis as the mounting hole 3B and through the second end 13A of the current collector 13.
- the inner gasket 14 has a ring-like overall shape.
- the inner gasket 14 has an outsize diameters substantially the same as the diameter D2 and an inner diameter substantially the same as the diameter D1 when it is compressed.
- An outer peripheral surface of the inner gasket 14 is in close contact with an inner wall of the insertion hole 13B for an entire circumference thereof.
- the top surface of the inner gasket 14 is in close contact with the inner surface 3A of the lid 3 for the entire circumference.
- the inner gasket 14 enhances sealing between the outer gasket 15 and the rivet 12, and the lid 3. Furthermore, the inner gasket 14 reduce heat transmission from the current collector 13, which becomes relatively high temperature, to the lid 3.
- the cutler gasket 15 is separately provided from the inner gasket 14.
- the outer gasket. 15 includes a tubular portion 15A having a tubular shape and a base portion 15B having a disk shape.
- the base portion 15B is provided integrally with an upper outer peripheral surface of the tubular portion 15A.
- the tubular portion 15A has an outside diameter substantially the same as the diameter D1 and an inside diameter substantially the same as an outside diameter D3 of a body 12A of the rivet 12 when it is compressed.
- the tubular portion 15A is press-fitted in the mounting hole 3B of the lid 3 and the insertion hole 13B of the current collector 13.
- the outer peripheral surfaces of the tubular portion 15B is in close contact with the lid 3 and the inner gasket 14 for an entire circumference thereof.
- an entire undersurface of the base portion 15B is in close contact with the outer surface of the lid 3.
- the rivet 12 includes the body 12A, a head 12B, a flange 12C.
- the head 12B is provided integrally with one end of the body 12A (the top end in FIG. 2 ).
- the flange 12C is provided integrally with the other end of the body 12A (the bottom end in FIG. 2 ).
- the rivet 12 is an example of the conductive member
- the head 12B is an example of the outside large-diameter portion
- the flange 12C is an example of the inside large-diameter portion.
- the body 12A has a round column-like shape with the outside diameter of the diameter D3, and is press-fitted in the tubular portion 15A of the outer gasket 15.
- the outside diameters of the head 12B and the flange 12C are larger than the outside diameter of the body 12A.
- the rivet 12 without the flange 12C is inserted into the tubular portion 15A of the outer gasket 15, and the bottom end of the body 12A is flattened. As a result, the flange 12C is created. Accordingly, the base portion 15B of the outer casket 15, the lid 3, the second end 13A of the current collector 13 and the inner gasket 14 are sandwiched between the head 12B and the flange 12C of the rivet 12. The outer gasket 15, the current collector 13, and the inner gasket 14 are fixed to the lid 3.
- the inner gasket 14 Before the flange 12C is formed, the inner gasket 14 is in a free state and has a thickness larger than that of the current collector 13. The inner gasket 14 protrudes lower than the current collector 13. With elasticity of the inner gasket. 14, a pressing force applied to the current collector 13 by the flange 12C during the flattening of the rivet 12 is reduced. Accordingly the current collector 13 is less likely to be damaged. Moreover, The diameter of the body 12A of the rivet 12 becomes larger after the rivet 12 is flattened. Accordingly, the inner gasket 14 and the tubular portion 15A of the outer gasket 15 are compressed and sandwiched between the body 12A of the rivet 12 and the second end 13A of the current collector 13. The inner gasket 14 and the tubular portion 15A are deformed and therefore the gaps between the lid 3 , the rivet 12 and the current collector 13 are more properly filled.
- the inside diameter D2 of the insertion hole 13B of the current collector 13 is smaller than the outside diameter of the flange 12C. Therefore, the outer portion of the flange 12C comes into contact with the current collector 13.
- a positive potential can be achieved through the positive terminal assembly 10. Furthermore, because the current collector 13 is electrically connected to the container 1 via the lid 3, the case has a potential.
- an external terminal 11 is electrically connected to the rivet 12 of the positive terminal assembly via a coupling body, which is not illustrated. The external terminal 11 may not be provided. In that case, the head 12B of the rivet 12 may be used as an external terminal,
- the positive terminal assembly 10 has the above configuration for electrically connecting the lid 3, the current collector 13 and the rivet 12 by holding the outer gaskets 15, the lid 3, the current collector 13, and the inner gasket 14 between the head 12B and the flange 12C of the rivet 12.
- the lid 3, the current collector 13, and the rivet 12 are fixed to one another in an environment where substances that may produce an adverse effect on the function of a battery, such as dust from welding and spatters, are not less likely to exist.
- the outer gasket 15 seals the gap between the lid 3 and the rivet 12. Therefore, the inner space of the case is not subjected to outside air.
- the outer gasket 15 also electrically isolates the components of the battery from one another except for between the current collector 13 and the lid 3, and between the current collector 13 and the rivet 12.
- the rivet 12 is used as the conductive member.
- the conductive member is not limited to the rivet.
- the conductive member may be a screw having a head and a nut screwed together.
- the negative terminal assembly 20 includes a current collector 23, an outer gasket 24, an inner gasket 25, and a rivet 22.
- a first end of the current collector 23, which is not illustrated, is connected to the negative electrode 2B.
- the second end 23A of the current collector 23 is insulated from the lid 3 by the inner gasket 25 and electrically connected to the rivet 22.
- a round mounting hole 3C is formed through the second end of the lid 3, and an insertion hole 23B is formed through the second end 23A of the current collector 23.
- the insertion hole 23B has a smaller diameter than that of the mounting hole 3C.
- the inner gasket 25 is arranged between the inner surface 3A of the lid 3 and a top surface of the current collector 23.
- the inner gasket 25 is in close contact with the inner surface 3A and the top surface.
- the inner gasket 25 has an insertion hole 25A with substantially the same diameter as that of the mounting hole 3C formed therethrough.
- the outer gasket 24 includes a tubular portion 24A and a base portion 24B, which have substantially the same shapes as the tubular portion ISA and the base portion 15B of the outer gasket 15, respectively.
- the tubular portion 24A is press-fitted in the mounting hole 3C of the lid 3 and the insertion hole 25A of the inner gasket 25.
- the lid 3 and the inner gasket 25 are in close contact with an outer peripheral surface of the tubular portion 24A for an entire circumference. Moreover, an entire bottom end surface of the tubular portion 24A is in close contact with the current collector 23.
- the rivet 22 includes a body 22A, a head 22B, and a flange 22C.
- the head 22B is provided at one end of the body 22A (the top end of the body 22A in FIG. 2 ).
- the flange 22c is provided at the other end of the body 22A (the bottom end of the body 22A in Fig. 2 ).
- the outside diameter of the body 22A is substantially the same as the inside diameters of the tubular portion 24A of the outer gasket 24 and the insertion hole 23B of the current collector 23.
- the outside diameters of the head 22B and the flange 22C are larger than the outside diameter of the body 22A.
- the rivet 22 without the flange 22C is inserted into the tubular portion 24A of the outer gasket 24, and the bottom end of the body 22A is flattened- As a result, the flange 22C is created. Accordingly, the base portion 24B of the outer gasket 24, the lid 3, the inner gasket 25, and the second end 23A of the current collector 23 are sandwiched between the head 223 and the flange 22C of the rivet 22. The outer gasket 24, the inner gasket 25 and the current collector 23 are fixed to the lid 3.
- the rivet 22 is electrically connected to the current collector 23; however, the lid 3 is insulated from the rivet 22 and the current collector 23 by the outer gasket 24 and the inner gasket 25.
- the external terminal 21 of the negative terminal assembly 20 is electrically connected to the rivet 22 via a coupling body which is not illustrated.
- the external terminal 21 may not be provided. In that case, the head 22B of the rivet 22 may be used as an external terminal.
- the negative terminal assembly 20 has the above configuration for electrically connecting the lid 3 and the rivet 22 by holding the outer gasket 24, the lid 3, the inner gasket 25 and the current collector 23 between the head 22B and the flange 22C of the rivet 22.
- the current collector 23 and the rivet 22 are fixed and electrically connected to each other in an environment where substances that may produce an adverse effect on the function of a battery, such as dust from welding and spatters, are not less likely to exist.
- the outer gasket 24 and the inner gasket 25 seals the gap between the lid 3 and the rivet 22. Therefore, the inner space of the case is not subjected to outside air.
- the outer gasket 24 also electrically isolates the components of the battery from one another except for between the current collector 23 and the rivet 22.
- the lid 3 has predetermined strength as a housing.
- the lid 3 is made of material having electric conductivity, such as stainless and aluminum and thus the case has an electric potential.
- the lid 3 is electrically connected to the current collector 13 through the positive terminal assembly 10.
- the lid 3 is further electrically connected to the container 1. Accordingly, the case has the positive potential.
- the current collectors 13 and 23 have predetermined strength, and are easy to be processes. Materials having good electric conductivity with low electric resistance are suitable for the current collectors 13 and 23, and copper, aluminum, or the like is used. Lightweight metals with good electric conductivity are used as materials of the current collectors 13 and 23. Aluminum or copper may be used.
- the current collectors 13 and 23 are in contact with the flanges 12C and 22C of the rivets 12 and 22 to establish electric continuity, and therefore a potential at any one of the positive electrode and the negative electrode can be achieved. Furthermore, the current collectors 13 and 23 are in contact with the outer gaskets 15 and 24 and the inner gaskets 14 and 25 to secure the sealing performance.
- the outer gaskets 15 and 24 and the inner gaskets 14 and 25 are insulators having elasticity, heat resistance, corrosion resistance, and airtightness.
- a material suitable for the outer gaskets 15 and 24 and the inner gaskets 14 and 25 may have flexibility that can make close contact with the lid 3 so that the leak of an electrolyte is less likely to occur.
- polyphenylens sulfide (PPS), tetrafluoroethylene/perfluoro alkyl vinyl ether copolymer (PFA), polypropylen (PP), or polyethylene terephthalate (PET) may be used,
- the outer gaskets 15 and 24 are provided separately from the inner gaskets 14 any 25.
- An expensive material having- high corrosion resistance may be used for the inner gaskets 14 and 25 that require especially corrosion resistance and heat resistance.
- An inexpensive material having lower corrosion resistance and the like than the inner gaskets 14 and 25 may be used for the outer gaskets 15 and 24. With the above configuration, the cost of the entire gaskets can be reduced.
- the outer gaskets 24 and the inner gasket 25 may not be limited to separate gaskets, but may be formed integrally.
- the rivets 12 and 22 require high electric conductivity, lightweight, and flexibility for flattening.
- the rivets 12 and 22 also require the strength to maintain the shapes after the flattening.
- Appropriate material for the rivets 12 and 22 includes aluminum and copper.
- the rivets 12 and 22 have the heads 12B and 22B arranged in the upper part of the terminal assemblies 10 and 20.
- the bottom ends of the bodies 12A and 22A are flattened.
- the rivets 12 and 22 are not limited to the above configurations. Rivets without a head have both ends flattened may be used.
- tubular rivets each having a hollow body to which a wedge-shaped body is nailed for fixing can be used.
- FIGS. 4 . and 5 A battery of a comparative example is illustrated in FIGS. 4 . and 5 .
- the battery includes a container 101, a battery lid 105, an insulating gasket 107, a rivet 108, a shank 122, an insulating gaskets 110 and 111 (cf. JP-A-2008-305644 ).
- the battery lid 105 is arranged so as to cover an opening of the container 101 and having a mounting hole 113.
- the insulating gasket 107 has a tubular portion 118 inserted into the mounting hole 113 of the battery lid 105 and a flange 117 formed on the perimeter of one opening end of the tubular portion 118.
- the rivet 108 for an output terminal of a positive or negative electrode has a shank 122 and a head 120.
- the shank 122 is inserted in the tubular portion 118 of the insulating gasket 107 and fixed to the battery lid 105.
- the head 120 is formed at one end of the shank 122 and arranged on the battery lid 105 via the flange 117 of the insulating gasket 107.
- the insulating gaskets 110 and 111 are arranged at least one of between the head 120 of the rivet 108 and the flange 117 of the insulating gasket 107 and between the battery lid 105 and the flange 117 of the insulating gasket 107.
- the battery includes an electrode 102, a round hole 106a, rivet insertion holes 110a and 111a, and a vent 114.
- the battery in the embodiment is capable of providing solutions for the above issues.
- a positive terminal assembly 30 illustrated in FIG. 6 is different from the positive terminal Assembly 10 only in a configuration of a contact area of an inner gasket 34 and an insertion hole 33B of a current collector 33.
- Other configurations are the same as the positive terminal assembly 10.
- the inner gasket 34 has a substantially triangular cross section, and is formed into a shape with an outside diameter thereof gradually decreasing toward the bottom.
- the insertion hole 33B of the current collector 33 is formed into a shape with an inside diameter thereof gradually decreasing toward the bottom. Accordingly, the inner gasket 34 and the current collector 33 are in contact with surfaces thereof that incline to an axis direction of the body 12A of the rivet 12. Accordingly, larger contact areas can be achieved between them a gap is further less likely to be formed in comparison to a configuration in which the current collector and the gasket are in contact with surfaces thereof that are parallel to the axis direction.
- the contact surface between the inner gasket 34 and the current collector 33 gradually inclines in a direction that approaches the rivet 12 toward the bottom.
- the contact surface between the inner gasket and the current collector is not limited to the above configurations. It may gradually incline in a direction away from the rivet 12 toward the bottom.
- the inner gasket 34 is held to the inclined surface of the current collector 33 before the rivet 12 is flattened. Therefore, the inner gasket 34 is less likely to come off the rivet 12.
- a terminal 40 for the positive electrode sown in FIG. 7 is different from the terminal 10 only in a configuration of an outer gasket, and the other configurations are the same as the terminal 10.
- An outer gasket 41 includes a tubular body 42 and a flat-plate body 43, which are provided separately from each other.
- the tubular body 42 is inserted in the mounting hole 3B.
- the flat-plate body 43 has a through hole 43A, aid an upper part of the tubular body 42 is press-fitted in the through hole 43A.
- an area in contact with the body 12A of the rivet 12 and an area in contact with the head 12B of the rivet 12 and the lid 3 may receive different pressures from different directions (vectors), or amounts of heat transmitted from the other components are different. The differences may cause local distortion over long use.
- the outer gasket 41, the tubular body 42 and the flat-plate body 43 are provided separately from each other. Therefore, loads are spread and elasticity, heat resistance, corrosion resistance and airtightness can be maintained for a long time.
- the flat-plate body 43 that requires the sealing performance more strongly is formed of a material having high flexibility, for example, PPS
- the cylindrical body 42 that has especially a large contact area and requires heat resistance more strongly is formed of a material having high heat resistance, for example, FPA. In this manner, a change in materials to be used in accordance with a part makes it possible to form a gasket structure having higher functionality.
- a positive terminal assembly 50 illustrated in FIG. 8 is different from the positive terminal assembly 40 only in a configuration of a gasket.
- the other configurations are the same as the positive terminal assembly 40.
- An, inner gasket 51 includes the tubular body 42 and the inner gasket 14 in the configuration illustrated in FIG. 7 formed in one piece.
- An inner surface of the inner gasket 51 is in contact with the body 12A of the rivet 12, and an outer peripheral surface thereof is in contact with the lid 3, the current collector 13 and the flat-plate body 43.
- the load applied to the inner gasket 50 is spread and elasticity, heat resistance, corrosion resistance and airtightness can be maintained for a long time.
- the flat-plate body 43 that requires the sealing performance more strongly is formed of a material having high flexibility, for example, PPS
- the inner gasket 51 that has especially a large contact area and requires heat resistance more strongly is formed of a material having high heat resistance, for example, FPA. In this manner, it is possible to form a gasket structure having higher functionality.
- a washer 63 is inserted between an outer gasket 61 and a head 62B of a rivet 62.
- the washer 63 that has the size to contain a peripheral edge 62D of the head 62B of the rivet 62 is inserted.
- the outer gasket 61 is disposed so as to contain a peripheral edge 63A of the washer 63. If the outer gasket 61 cannot be fully held with the size of the head 62B of the rivet 62, it is not possible to make full use of the elasticity of the outer gasket 61.
- the washer 63 enhances holding and fixing functions of the outer gasket 61. As illustrated in FIG.
- an edge such as a projection 61A of the outer gasket 61 is provided in a position corresponding to the peripheral edge 63A of the washer 63, and the outer gasket 61 is disposed so as to contain the peripheral edge 63A of the washer 63. Accordingly, the outer gasket 61, the washer 63 and the rivet 62 are properly fixed.
- the configurations are not limited to them.
- Combinations thereof, for example, the triangular, inner gasket 34 may be used in the configuration illustrated in FIG. 2 or 7 .
- a washer may be used.
- a washer may be sandwiched between a flange of a rivet and a current collector .
- the battery is used as an electric storage device.
- an electric double layer capacitor may be used as an electric storage device.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Claims (11)
- Elektrische Speichervorrichtung, die aufweist:ein Gehäuse mit einem Befestigungsloch (3B, 3C);eine positive Elektrode (2A) und eine negative Elektrode (2B), die im Gehäuse untergebracht sind;einen Stromabnehmer (13, 23), der ein erstes Ende und ein zweites Ende (13A, 23A) aufweist, wobei das erste Ende mit irgendeiner der positiven Elektrode (2A) und der negativen Elektrode (2B) verbunden ist, wobei sich das zweite Ende (13A, 23A) in einem Oberflächenkontakt mit einer Innenfläche (3A) des Gehäuses befindet und mit der Innenfläche (3A) des Gehäuses elektrisch verbunden ist;eine Dichtung, die eine innere Dichtung (14, 25) aufweist, die mit einem Bereich der Innenfläche (3A) des Gehäuses zwischen dem Befestigungsloch (3B, 3C) und dem zweiten Ende (13A, 23A) des Stromabnehmers (13, 23) in Kontakt steht; undein leitfähiges Element (12, 22), das einen Körper (12A, 22A) und einen inneren Abschnitt mit großem Durchmesser (12C, 22C) aufweist, der einen größeren Durchmesser als der Körper (12A, 22A) aufweist, wobei der Körper (12A, 22A) im Befestigungsloch (3B, 3C) des Gehäuses angeordnet ist, wobei der innere Abschnitt mit großem Durchmesser (12C, 22C) an einem Ende des Körpers (12A, 22A) innerhalb des Gehäuses angeordnet ist, mit dem zweiten Ende (13A, 23A) des Stromabnehmers (13, 23) elektrisch verbunden ist und so angeordnet ist, dass er mit der inneren Dichtung (14, 25) in Kontakt steht, so dass die innere Dichtung (14, 25) und das zweite Ende (13A, 23A) des Stromabnehmers (13, 23) zwischen dem inneren Abschnitt mit großem Durchmesser (12C, 22C) und dem Gehäuse eingelegt sind.
- Elektrische Speichervorrichtung nach Anspruch 1, wobei die innere Dichtung (14, 25) zwischen dem zweiten Ende (13A, 23A) des Stromabnehmers (13, 23) und dem Körper (12A, 22A) des leitfähigen Elements (12, 22) eingelegt ist.
- Elektrische Speichervorrichtung nach einem der Ansprüche 1 und 2, wobei das leitfähige Element (12, 22) einen äußeren Abschnitt mit großem Durchmesser (12B, 22B) aufweist, der einen größeren Durchmesser als der Körper (12A, 22A) aufweist, wobei der äußere Abschnitt mit großem Durchmesser (12B, 22B) an einem anderen Ende des Körpers (12A, 22A) außerhalb des Gehäuses angeordnet ist, und
die Dichtung ferner eine äußere Dichtung (15, 24) aufweist, die zwischen dem äußeren Abschnitt mit großem Durchmesser (12B, 22B) des leitfähigen Elements (12, 22) und einer Außenfläche des Gehäuses eingelegt ist. - Elektrische Speichervorrichtung nach Anspruch 3, die ferner eine äußere Unterlegscheibe aufweist, die einen kleineren Durchmesser als die äußere Dichtung (15, 24) aufweist, wobei die äußere Unterlegscheibe zwischen dem äußeren Abschnitt mit gro-ßem Durchmesser (12B, 22B) des leitfähigen Elements (12, 22) und der äußeren Dichtung (15, 24) angeordnet ist.
- Elektrische Speichervorrichtung nach Anspruch 4, wobei die äußere Dichtung (15, 24) einen Vorsprung in Kontakt mit einer Außenumfangsfläche der äußeren Unterlegscheibe aufweist.
- Elektrische Speichervorrichtung nach einem der Ansprüche 3 bis 5, wobei die innere Dichtung (14, 25) und die äußere Dichtung (15, 24) aus unterschiedlichen Materialien bestehen.
- Elektrische Speichervorrichtung nach einem der Ansprüche 3 bis 6, wobei
die Dichtung ferner eine röhrenförmige Dichtung (15A, 24A) aufweist, die eine Außenumfangsfläche und eine Innenumfangsfläche aufweist, wobei die Außenumfangsfläche in Kontakt mit einer Wand des Befestigungslochs (3B, 3C) steht, die Innenumfangsfläche in Kontakt mit dem Körper (12A, 22A) des leitfähigen Elements (12, 22) steht, und die röhrenförmige Dichtung (15A, 24A) mit mindestens einer der inneren Dichtung (14, 25) und der äußeren Dichtung (15, 24) integral ausgebildet ist, und
die mindestens eine der inneren Dichtung (14, 25) und der äußeren Dichtung (15, 24) ein Durchgangsloch mit einer Kante aufweist, die mit dem röhrenförmigen Abschnitt über einen gesamten Außenumfang in Kontakt steht. - Elektrische Speichervorrichtung nach einem der Ansprüche 1 bis 7, wobei
das leitfähige Element (12, 22) eine abgeschrägte Oberfläche aufweist, die bezüglich einer Achse des Körpers (12A, 22A) angewinkelt ist, und
das zweite Ende (13A, 23A) des Stromabnehmers (13, 23) und die innere Dichtung (14, 25) in Kontakt mit der abgeschrägten Oberfläche stehen. - Elektrische Speichervorrichtung nach einem der Ansprüche 1 bis 8, die ferner eine innere Unterlegscheibe aufweist, die zwischen dem zweiten Ende (13A, 23A) des Stromabnehmers (13, 23) und dem inneren Abschnitt mit großem Durchmesser (12C, 22C) des leitfähigen Elements (12, 22) angeordnet ist.
- Elektrische Speichervorrichtung nach Anspruch 3, wobei die innere Dichtung (14, 25) und die äußere Dichtung (15, 24) integral vorgesehen sind.
- Elektrische Speichervorrichtung nach Anspruch 7, wobei die innere Dichtung (14, 25),
die äußere Dichtung (15, 24) und die röhrenförmige Dichtung (15A, 24A) integral vorgesehen sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2011021984 | 2011-02-03 | ||
JP2012001986A JP5987320B2 (ja) | 2011-02-03 | 2012-01-10 | 蓄電素子 |
Publications (2)
Publication Number | Publication Date |
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EP2485291A1 EP2485291A1 (de) | 2012-08-08 |
EP2485291B1 true EP2485291B1 (de) | 2017-08-02 |
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EP12153238.6A Active EP2485291B1 (de) | 2011-02-03 | 2012-01-31 | Elektrische Speichervorrichtung |
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US (1) | US8753766B2 (de) |
EP (1) | EP2485291B1 (de) |
JP (1) | JP5987320B2 (de) |
KR (1) | KR101896535B1 (de) |
CN (1) | CN102629672B (de) |
Families Citing this family (10)
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JP6364752B2 (ja) * | 2012-12-28 | 2018-08-01 | 株式会社Gsユアサ | 封止部材キャップ、蓄電素子、蓄電素子の製造方法 |
JP2015043282A (ja) * | 2013-08-26 | 2015-03-05 | 株式会社Gsユアサ | 蓄電素子 |
DE112015000896T5 (de) * | 2014-02-21 | 2016-11-17 | Gs Yuasa International Ltd. | Energiespeichervorrichtung und Verfahren zur Herstellung einer Energiespeichervorrichtung |
JP6265019B2 (ja) * | 2014-04-15 | 2018-01-24 | 株式会社豊田自動織機 | 蓄電装置 |
WO2016060265A1 (ja) * | 2014-10-17 | 2016-04-21 | 株式会社 豊田自動織機 | 蓄電装置 |
JP6550863B2 (ja) * | 2015-03-31 | 2019-07-31 | 株式会社Gsユアサ | 蓄電素子及び蓄電素子の製造方法 |
US11431047B2 (en) * | 2018-05-07 | 2022-08-30 | Apple Inc. | Feedthrough with integrated insulator |
US11145925B2 (en) | 2018-09-06 | 2021-10-12 | Apple Inc. | Cylindrical battery cell with overmolded glass feedthrough |
US11417926B2 (en) | 2018-11-29 | 2022-08-16 | Apple Inc. | Feedthroughs for thin battery cells |
CN114667583A (zh) * | 2020-02-14 | 2022-06-24 | Ls材料有限公司 | 储能装置 |
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EP2477251A1 (de) * | 2011-01-17 | 2012-07-18 | GS Yuasa International Ltd. | Elektrische Speichervorrichtung |
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CN2502406Y (zh) * | 2001-09-07 | 2002-07-24 | 深圳市比亚迪锂电池有限公司 | 锂离子电池 |
CN2502407Y (zh) * | 2001-09-24 | 2002-07-24 | 姚旦 | 内置式的地球仪电池盒 |
JP3937427B2 (ja) | 2001-11-20 | 2007-06-27 | 株式会社ジーエス・ユアサコーポレーション | 電池の製造方法 |
US6673489B2 (en) * | 2001-12-28 | 2004-01-06 | Quallion Llc | Electric battery assembly and method of manufacture |
JP2004111300A (ja) | 2002-09-20 | 2004-04-08 | Japan Storage Battery Co Ltd | 非水電解質二次電池 |
JP2005100769A (ja) * | 2003-09-24 | 2005-04-14 | Toshiba Battery Co Ltd | 角形非水電解液電池 |
KR100865122B1 (ko) * | 2003-10-03 | 2008-10-23 | 히다치 막셀 가부시키가이샤 | 밀폐형 전지 |
US7807285B1 (en) * | 2004-04-07 | 2010-10-05 | Quallion Llc | Battery connection structure and method |
JP4780598B2 (ja) * | 2004-09-29 | 2011-09-28 | 日立マクセルエナジー株式会社 | 密閉角形電池 |
JP5036129B2 (ja) * | 2004-11-29 | 2012-09-26 | Necエナジーデバイス株式会社 | 二次電池 |
JP5236199B2 (ja) * | 2007-03-30 | 2013-07-17 | 株式会社Kri | 非水系二次電池 |
JP5121279B2 (ja) * | 2007-03-30 | 2013-01-16 | 三洋電機株式会社 | 密閉型電池の製造方法 |
JP2008305644A (ja) | 2007-06-06 | 2008-12-18 | Toshiba Corp | 電池 |
JP5319947B2 (ja) * | 2008-03-25 | 2013-10-16 | 株式会社東芝 | 非水電解質電池 |
JP2010027546A (ja) * | 2008-07-24 | 2010-02-04 | Toshiba Corp | バッテリ装置 |
JP5481827B2 (ja) * | 2008-10-15 | 2014-04-23 | 株式会社Gsユアサ | 電池 |
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- 2012-01-10 JP JP2012001986A patent/JP5987320B2/ja active Active
- 2012-01-27 KR KR1020120008209A patent/KR101896535B1/ko active IP Right Grant
- 2012-01-31 EP EP12153238.6A patent/EP2485291B1/de active Active
- 2012-02-01 US US13/363,655 patent/US8753766B2/en active Active
- 2012-02-02 CN CN201210022937.XA patent/CN102629672B/zh not_active Expired - Fee Related
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EP2477251A1 (de) * | 2011-01-17 | 2012-07-18 | GS Yuasa International Ltd. | Elektrische Speichervorrichtung |
Also Published As
Publication number | Publication date |
---|---|
CN102629672B (zh) | 2015-12-09 |
US20120202107A1 (en) | 2012-08-09 |
JP5987320B2 (ja) | 2016-09-07 |
CN102629672A (zh) | 2012-08-08 |
KR20120089573A (ko) | 2012-08-13 |
EP2485291A1 (de) | 2012-08-08 |
JP2012178337A (ja) | 2012-09-13 |
US8753766B2 (en) | 2014-06-17 |
KR101896535B1 (ko) | 2018-09-07 |
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